Calibration system and calibration method for a converting machine

A converting machine comprising a rotary die-cutting tool and a plurality of individually controllable transfer drives, each transfer drive being operationally connected to at least one transfer unit configured to transport a sheet along a travel path in a direction of conveyance through the converting machine, the converting machine further comprising a calibration system comprising:

• an image sensor configured to capture an actual image of an indicia on a sheet passing through the converting machine,
• a memory configured to store an optimal position of a predetermined reference point in the indicia comprising a lateral coordinate and a longitudinal coordinate, and
• a control unit configured to receive data from the image sensor and determine a lateral coordinate and a longitudinal coordinate of a detected reference point in the indicia, and calculate a deviation comprising a longitudinal indicia displacement and a lateral indicia displacement from the position of the detected reference point in relation to the position of the predetermined reference point,
• wherein the control unit is further configured to execute a correction program stored in the memory when at least one of the longitudinal indicia displacement and the lateral indicia displacement exceeds a predetermined tolerance threshold.